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WO2024031307A1 - Procédé et appareil de rétroaction de demande de répétition automatique hybride (harq), et dispositif et support - Google Patents

Procédé et appareil de rétroaction de demande de répétition automatique hybride (harq), et dispositif et support Download PDF

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Publication number
WO2024031307A1
WO2024031307A1 PCT/CN2022/111063 CN2022111063W WO2024031307A1 WO 2024031307 A1 WO2024031307 A1 WO 2024031307A1 CN 2022111063 W CN2022111063 W CN 2022111063W WO 2024031307 A1 WO2024031307 A1 WO 2024031307A1
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WIPO (PCT)
Prior art keywords
feedback
mbs
sps
codebook
pdsch
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PCT/CN2022/111063
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English (en)
Chinese (zh)
Inventor
马腾
张世昌
赵振山
丁伊
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN202280093610.3A priority Critical patent/CN118844048A/zh
Priority to PCT/CN2022/111063 priority patent/WO2024031307A1/fr
Publication of WO2024031307A1 publication Critical patent/WO2024031307A1/fr
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems

Definitions

  • the present application relates to the field of wireless communications, and in particular to a hybrid automatic repeat request HARQ feedback method, device, equipment and medium.
  • Multimedia Broadcast Multicast Service is a service introduced in Release 6 of 3GPP (3rd Generation Partnership Project).
  • Multimedia broadcast multicast service is a technology that transmits data from one data source to multiple user devices by sharing network resources. While providing multimedia services, it can effectively utilize network resources and achieve higher-speed multimedia service broadcast and multicast.
  • 5G fifth generation mobile communication technology
  • MMS Multicast and Broadcast Services
  • the NR New Radio, New Air Interface
  • ACK affirmative response
  • NACK negative response
  • HARQ Hybrid Automatic Repeat reQuest, hybrid automatic repeat request
  • the embodiments of this application provide a hybrid automatic repeat request HARQ feedback method, device, equipment and medium, which can use the NACK-only (negative response only) feedback mode to perform SPS (Semi-Persistent Scheduling, semi-persistent scheduling of MBS services) ) HARQ feedback of PDSCH (Physical Downlink Shared Channel, physical downlink shared channel).
  • SPS Semi-Persistent Scheduling, semi-persistent scheduling of MBS services
  • PDSCH Physical Downlink Shared Channel, physical downlink shared channel
  • a hybrid automatic repeat request HARQ feedback method is provided and applied to a terminal.
  • the method includes:
  • the reception feedback of the semi-persistent scheduling SPS physical downlink shared channel PDSCH of the multicast broadcast service MBS is reported to the access network device according to the NACK-only feedback mode.
  • a hybrid automatic repeat request HARQ feedback method is provided, which is applied to access network equipment.
  • the method includes:
  • a hybrid automatic repeat request HARQ feedback device includes:
  • the first sending module is configured to report the reception feedback of the semi-persistent scheduling SPS physical downlink shared channel PDSCH of the multicast broadcast service MBS to the access network device according to the NACK-only feedback mode.
  • a hybrid automatic repeat request HARQ feedback device includes:
  • the second receiving module is configured to receive reception feedback of the semi-persistent scheduling SPS physical downlink shared channel PDSCH of the multicast broadcast service MBS sent by the terminal according to the NACK-only feedback mode.
  • a terminal which terminal includes: a processor and a transceiver connected to the processor; wherein,
  • the transceiver is configured to report the reception feedback of the semi-persistent scheduling SPS physical downlink shared channel PDSCH of the multicast broadcast service MBS to the access network device according to the NACK-only feedback mode.
  • a network device includes: a processor and a transceiver connected to the processor; wherein,
  • the transceiver is configured to receive reception feedback of the semi-persistent scheduling SPS physical downlink shared channel PDSCH of the multicast broadcast service MBS sent by the terminal according to the NACK-only feedback mode.
  • a terminal includes: a processor and a memory.
  • the memory stores at least one instruction, at least a program, a code set or an instruction set.
  • the at least one instruction, the The at least one program, the code set or the instruction set are loaded and executed by the processor to implement the hybrid automatic repeat request HARQ feedback method as described in the above aspect.
  • a network device includes: a processor and a memory.
  • the memory stores at least one instruction, at least a program, a code set or an instruction set.
  • the at least one instruction The at least one program, the code set or the instruction set are loaded and executed by the processor to implement the hybrid automatic repeat request HARQ feedback method as described in the above aspect.
  • a computer-readable storage medium stores executable instructions, and the executable instructions are loaded and executed by a processor to enable the communication device to implement the above aspects.
  • a chip is provided.
  • the chip includes programmable logic circuits and/or program instructions.
  • a computer program product When the computer program product is run on a processor of a communication device, the computer program product causes the communication device to perform the hybrid automatic repeat request HARQ feedback method described in the above aspect.
  • the terminal feeds back the reception status of MBS's SPS PDSCH to the access network device according to the NACK-only feedback mode. If it successfully receives the MBS's SPS PDSCH, it will not send feedback information to the access network device. If it fails to receive the MBS's SPS PDSCH, it will The access network device sends feedback information (NACK) indicating reception failure.
  • NACK feedback information
  • the NACK-only feedback mode can reduce the size of feedback information, reduce the occupation of uplink feedback resources, and improve resource utilization. Rate.
  • Figure 1 is a schematic diagram of a communication system provided by an exemplary embodiment of the present application.
  • Figure 2 is a schematic channel diagram provided by an exemplary embodiment of the present application.
  • Figure 3 is a schematic diagram of MBS transmission provided by an exemplary embodiment of the present application.
  • Figure 4 is a flow chart of a HARQ feedback method provided by an exemplary embodiment of the present application.
  • Figure 5 is a schematic diagram of a HARQ feedback method provided by an exemplary embodiment of the present application.
  • Figure 6 is a flow chart of a HARQ feedback method provided by an exemplary embodiment of the present application.
  • Figure 7 is a flow chart of a HARQ feedback method provided by an exemplary embodiment of the present application.
  • Figure 8 is a schematic diagram of a HARQ feedback method provided by an exemplary embodiment of the present application.
  • Figure 9 is a schematic diagram of a HARQ feedback method provided by an exemplary embodiment of the present application.
  • Figure 10 is a flow chart of a HARQ feedback method provided by an exemplary embodiment of the present application.
  • Figure 11 is a schematic diagram of a HARQ feedback method provided by an exemplary embodiment of the present application.
  • Figure 12 is a schematic diagram of a HARQ feedback method provided by an exemplary embodiment of the present application.
  • Figure 13 is a schematic diagram of a HARQ feedback method provided by an exemplary embodiment of the present application.
  • Figure 14 is a schematic diagram of a HARQ feedback method provided by an exemplary embodiment of the present application.
  • Figure 15 is a structural block diagram of a HARQ feedback device provided by an exemplary embodiment of the present application.
  • Figure 16 is a structural block diagram of a HARQ feedback device provided by an exemplary embodiment of the present application.
  • Figure 17 is a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.
  • the network architecture 100 may include: a terminal 10, an access network device 20 and a core network device 30.
  • the terminal 10 may refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, user agent or user device.
  • the terminal 10 may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, or a Personal Digital Assistant (PDA).
  • handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminals in the fifth generation mobile communication system (5th Generation System, 5GS) or public land in future evolutions Terminals in a mobile communication network (Public Land Mobile Network, PLMN), etc. are not limited in the embodiments of the present application.
  • the devices mentioned above are collectively called terminals.
  • the number of terminals 10 is usually multiple, and one or more terminals 10 may be distributed in the cell managed by each access network device 20 .
  • the access network device 20 is a device deployed in the access network to provide wireless communication functions for the terminal 10 .
  • the access network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, etc.
  • the names of devices with access network device functions may be different. For example, in 5G NR systems, they are called gNodeB or gNB.
  • the name "access network equipment" may change.
  • the above-mentioned devices that provide wireless communication functions for the terminal 10 are collectively referred to as access network equipment.
  • a communication relationship can be established between the terminal 10 and the core network device 30.
  • the access network device 20 may be an Evolved Universal Terrestrial Radio Access Network (EUTRAN) or one or more eNodeBs in EUTRAN;
  • EUTRAN Evolved Universal Terrestrial Radio Access Network
  • the access network device 20 may be a radio access network (Radio Access Network, RAN) or one or more gNBs in the RAN.
  • RAN Radio Access Network
  • the network device refers to the access network device 20, such as a base station, unless otherwise specified.
  • the core network device 30 is a device deployed in the core network.
  • the core network device 30 mainly functions to provide user connections, manage users, and carry services, and serves as an interface for the bearer network to provide to external networks.
  • the core network equipment in the 5G NR system can include Access and Mobility Management Function (AMF) network elements, User Plane Function (UPF) network elements and Session Management Function (Session Management Function, SMF) network element, etc.
  • AMF Access and Mobility Management Function
  • UPF User Plane Function
  • SMF Session Management Function
  • the access network device 20 and the core network device 30 communicate with each other through some air interface technology, such as the NG interface in the 5G NR system.
  • the access network device 20 and the terminal 10 communicate with each other through some air interface technology, such as the Uu interface.
  • the network architecture may include: terminal 10, access network equipment 20 and core network equipment 30.
  • the core network equipment 30 includes NSSF (Network Slice Selection Function), AUSF (Authentication Server Function), UDM (Unified Data Management, unified data management), AMF (Access and Mobility Management Function) , access and mobility management function), SMF (Session Management Function, session management function), PCF (Policy Control Function, policy control function), UPF (User Plane Function, user plane function), SF (Sensing Function, perception control Function).
  • NSSF Network Slice Selection Function
  • AUSF Authentication Server Function
  • UDM Unified Data Management, unified data management
  • AMF Access and Mobility Management Function
  • SMF Session Management Function, session management function
  • PCF Policy Control Function
  • UPF User Plane Function
  • user plane function User Plane Function
  • SF Sensing Function, perception control Function
  • the UE connects to the access layer with the AN (Access Network) through the Uu interface, and exchanges access layer messages and wireless data transmission.
  • the UE connects to the non-access layer (None Access Stratum, NAS) with the AMF through the N1 interface.
  • Exchange NAS messages are the mobility management function in the core network
  • SMF is the session management function in the core network.
  • the AMF is also responsible for forwarding session management related messages between the UE and the SMF.
  • PCF is the policy management function in the core network and is responsible for formulating policies related to UE mobility management, session management, and charging.
  • PCF transmits data with external application functions (Application Function, AF) through the N5 interface.
  • UPF is the user plane function in the core network. It transmits data with the external data network (Data Network, DN) through the N6 interface and transmits data with the AN through the N3 interface.
  • the "5G NR system” in the embodiments of this application may also be called a 5G system or an NR system, but those skilled in the art can understand its meaning.
  • the technical solutions described in the embodiments of this application can be applied to the LTE system, the 5G NR system, the subsequent evolution system of the 5G NR system, and the Narrow Band Internet of Things (NB).
  • NB Narrow Band Internet of Things
  • 5G enhanced Mobile Broadband
  • URLLC ultra-reliable low-latency communications
  • mMTC massive machine type of communication
  • eMBB still aims at users to obtain multimedia content, services and data, and its demand is growing rapidly.
  • eMBB may be deployed in different scenarios, such as indoors, urban areas, villages, etc., its capabilities and requirements are also quite different, so it cannot be generalized and must be analyzed in detail based on specific deployment scenarios.
  • Typical applications of URLLC include: industrial automation, power automation, telemedicine operations (surgery), traffic safety and security, etc.
  • Typical features of mMTC include: high connection density, small data volume, delay-insensitive services, low cost and long service life of the module.
  • RRC Radio Resource Control
  • RRC_INACTIVE RRC inactive state
  • RRC_ACTIVE RRC active state
  • RRC_CONNECTED RRC connected state
  • RRC_IDLE Mobility is UE-based cell selection/reselection, paging is initiated by CN (Core Network), and the paging area is configured by CN. There is no UE AS (Access Stratum, access layer) context on the base station side. There is no RRC connection.
  • CN Core Network
  • UE AS Access Stratum, access layer
  • RRC_CONNECTED There is an RRC connection, and the base station and the UE have a UE AS context. The network side knows the location of the UE at the specific cell level. Mobility is network-side controlled mobility. Unicast data can be transmitted between the UE and the base station.
  • Mobility is UE-based cell selection/reselection, there is a connection between CN and NR, UE AS context exists on a base station, paging is triggered by RAN, RAN-based paging area is managed by RAN, network side Knowing the location of the UE is based on the paging area level of the RAN.
  • the maximum channel bandwidth can be 400MHZ, which is very large compared to the maximum bandwidth of 20M in LTE. If the UE keeps working on a wideband carrier, the power consumption of the UE is relatively large. Therefore, it is recommended that the RF (Radio Frequency, electromagnetic frequency) bandwidth of the UE can be adjusted according to the actual throughput of the UE.
  • BWP BandWidth Part, bandwidth part
  • BWP is used to optimize the power consumption of the UE. For example, if the UE's rate is very low, a smaller bandwidth is configured for the UE. If the UE's rate requirements are very high, a larger bandwidth is configured for the UE.
  • BWPs can be configured for the UE. Another purpose of BWP is to trigger the coexistence of multiple basic parameter sets (numerology) in a cell.
  • the UE in the current RRC_IDLE state or RRC_INACTIVE state resides on the initial (initial) BWP.
  • This BWP is visible to the UE in the RRC_IDLE state or RRC_INACTIVE state.
  • the UE can obtain the MIB (Master Information Block) on this BWP.
  • RMSI Remaining Minimum System Information, remaining minimum system information
  • CFR is a concept introduced during the discussion of Release 17NR MBS to distinguish it from BWP.
  • CFR is a continuous set of frequency domain resources located on the carrier and is used to receive MBS services. From the perspective of a single UE, a CFR is a continuous set of frequency domain resources used to receive downlink MBS service data; from a system perspective, a CFR is used to send MBS service data.
  • a group of UEs in the connected state (RRC_CONNECTED) The multicast/multicast of the MBS is received in the CFR, and the UEs in the non-connected state (RRC_IDLE/RRC_INACTIVE) receive the broadcast of the MBS on the CFR.
  • MBMS and SC-PTM Single Cell-Point-to-Multipoint, but cell point-to-multipoint
  • MBMS is a service introduced in 3GPP Release 6.
  • MBMS is a technology that transmits data from one data source to multiple user devices by sharing network resources. While providing multimedia services, it can effectively utilize network resources and achieve higher-speed (for example, 256kbps)) multimedia service broadcast and Multicast.
  • 3GPP Due to the low spectrum efficiency of MBMS in 3GPP Release 6, it is not enough to effectively carry and support the operation of mobile TV-type services. Therefore, in the wireless access network long-term evolution standard (Long Term Evolution, LTE) project, 3GPP clearly proposed to enhance the support capabilities for downlink high-speed multimedia broadcast multicast service services, and determined the design requirements for the physical layer and air interface.
  • LTE Long Term Evolution
  • E-MBMS was introduced to LTE networks in Release 9.
  • E-MBMS proposes the concept of SFN (Single Frequency Network), which uses a unified frequency to send data to all cells at the same time, but must ensure synchronization between cells. This method can greatly improve the overall signal-to-noise ratio distribution of the cell, and the spectrum efficiency will also be greatly improved accordingly.
  • IP Internet Protocol. Internet Protocol
  • the broadcast and multicast of services are realized.
  • MBMS has only broadcast bearer mode and no multicast bearer mode.
  • Reception of MBMS services is applicable to UEs in RRC_CONNECTED or RRC_IDLE state.
  • SC-PTM is introduced.
  • SC-PTM is based on the MBMS network architecture.
  • MCE Multi-cell/multicast Coordination Entity, multi-cell/multicast coordination entity
  • SC-PTM transmission method or MBSFN (Multimedia Broadcast multicast service Single Frequency Network, in single frequency network Multimedia broadcast multicast service) transmission method.
  • MBSFN Multimedia Broadcast multicast service Single Frequency Network, in single frequency network Multimedia broadcast multicast service
  • SC-MCCH Single Cell Multicast Control Channel, single cell multicast control channel
  • SC-MTCH Single Cell Multicast Transport Channel, single cell multicast transmission channel
  • DL -SCH Downlink Shared Channel, downlink shared channel
  • SC-MCCH and SC-MTCH do not support HARQ operation.
  • the SC-MCCH configuration information includes: SC-MCCH modification period, repetition period, and radio frame and subframe configuration information.
  • the subframe scheduled by SC-MCCH is indicated by sc-mcch-Subframe (single cell multicast control channel subframe).
  • SC-MCCH only transmits one message SCPTMConfiguration (single cell point-to-multiple configuration), which is used to configure SC-PTM configuration information.
  • SCPTMConfiguration single cell point-to-multiple configuration
  • SC-RNTI Single Cell RNTI, single cell RNTI
  • FFFC fixed value FFFC
  • SC-N-RNTI Single Cell Notification RNTI
  • FFFB Fixed value FFFB
  • DCI Downlink Control Information 1C
  • SFN mod m 0, where m is the modification period (sc-mcch-ModificationPeriod) configured in SIB20.
  • RLC Radio Link Control
  • ARQ Automatic Repeat-reQuest
  • the receiving end sends an RLC status report to feedback that the reception status of the RLC packet is ACK (acknowledgement/confirmation) or NACK (negative acknowledgement/denial).
  • the sender can repeatedly transmit the RLC packet of SN (Sequence Number, sequence number) that returns NACK.
  • the downlink BWP is configured through the BWP-Downlink parameter, as shown in the first ASN.1 encoding below.
  • This parameter includes the bwp-Id field to identify the ID of the current BWP.
  • bwp-Common is used to configure the public parameters of the downlink BWP, as shown below.
  • the genericParameters in BWP-DownlinkCommon are used to configure the frequency domain starting point and the number of PRBs included in the downlink BWP.
  • the bwp-Dedicated parameter in BWP-Downlink will configure the downlink reception parameters on the downlink BWP, as shown in the ASN.1 encoding in the third paragraph below, including at least pdcch-Config, pdsch-Config, and sps-Config, as shown in the second ASN.1 encoding, pdcch-Config is used to indicate the PDCCH transmission method on the downlink BWP, pdsch-Config is used to indicate the PDSCH transmission method on the downlink BWP, sps-Config is used to Indicates the SPS configuration on this downstream BWP.
  • base station scheduling and transmission methods include the following:
  • Sending MBS services by broadcasting is applicable when the terminal is in the RRC_IDLE/RRC_INACTIVE (non-connected) state, and when the terminal is in the RRC_CONNECTED (connected) state. That is, the MBS service transmitted through broadcasting can be received by the terminal no matter what connection state it is in, as long as the terminal is within the coverage area.
  • Sending MBS services to a group of terminals in multicast mode is applicable when all terminals in the group are in the RRC_CONNECTED state.
  • the base station sends the same MBS service to a group of terminals through one-to-many PTM transmission.
  • Sending MBS services to each terminal in unicast mode is suitable for terminals in the RRC_CONNECTED state.
  • the base station sends the same MBS service to each terminal in a one-to-one (Point-To-Point, PTP) transmission mode.
  • PTP Point-To-Point
  • NR MBS In NR MBS, one-to-many multicast transmission needs to be supported.
  • the base station In this transmission method, the base station needs to schedule the public PDSCH by sending a public downlink control channel.
  • the public PDCCH Physical Downlink Control Channel
  • the public PDSCH is sent within a common frequency domain range (Common Frequency Resource, CFR).
  • the CFR is configured as an MBS-specific BWP.
  • the MBS-specific BWP is associated with the terminal's dedicated unicast BWP, and the subcarrier spacing and cyclic prefix configured on the CFR are the same as those configured on the terminal's dedicated unicast BWP.
  • CFR is configured as multiple consecutive PRBs (Physical Resource Block, physical resource block) within the range of terminal-specific unicast BWP.
  • the advantage of the first method is that CFR can continue to use the existing BWP signaling configuration, which is helpful to reduce the workload of the standard.
  • CFR is defined as BWP
  • the terminal if the terminal is required to receive unicast in the dedicated unicast BWP and receive unicast in the BWP at the same time, Receiving multicast within the CFR means that the terminal needs to receive downlink transmission on two BWPs at the same time.
  • the terminal can only receive downlink on one BWP at a given time.
  • the terminal receives unicast and multicast at different times, due to The two are located in different BWPs, which will also introduce BWP switching delay.
  • the second method can avoid the problem of BWP handover, but because the CFR in this method is multiple consecutive PRBs, the current BWP-based signaling configuration cannot be used, and the resource range and uplink and downlink transmission parameters of the CFR need to be redesigned.
  • the configuration method has a greater impact on the standard.
  • the terminals since the public PDCCH that schedules the public PDSCH needs to be sent to multiple receiving terminals at the same time, in order to ensure that the number of bits of the public DCI carried in the public PDCCH determined by the multiple terminals is the same, the terminals cannot configure their own dedicated unicast BWPs. Determine the number of public DCI bits.
  • the number of PRBs in the CFR may be different from the initial BWP or CORESET#0 (COntrol REsource SET 0, control resource set 0) currently configured by the terminal, the terminal cannot pass the initial BWP or CORESET#0. Determine the number of bits for the common DCI.
  • the number of public DCI bits may be different from the number of DCI bits received by the terminal in the existing USS or CSS. Then, in order to reduce the implementation complexity of the terminal, currently the terminal can only receive up to 4 DCI bits with different numbers in a cell, among which the number of DCI bits scrambled by C-RNTI does not exceed 3 types.
  • Group sharing PDCCH/PDSCH means that the PDCCH/PDSCH sent by the base station on a set of time-frequency resources can be received by multiple UEs in the same group.
  • the PTM scheduling methods mentioned in this application all refer to PTM1.
  • ⁇ PTM 1 For multiple UEs in the same group in the connected state, the group sharing PDCCH is used to schedule the group sharing PDSCH.
  • the CRC (Cyclic Redundancy Check, cyclic redundancy check) of the group sharing PDCCH is scrambled using the group sharing RNTI, and the group sharing PDSCH uses the same group shared RNTI for scrambling.
  • ⁇ PTM 2 For multiple UEs in the same group in the connected state, use the UE-specific PDCCH scheduling group to share the PDSCH for each UE.
  • the CRC of the UE-specific PDCCH is scrambled using the UE-specific RNTI (i.e. C-RNTI), and the group shares the PDSCH. Scrambling using group shared RNTI.
  • ⁇ PTP For connected UEs, use the UE-specific PDCCH to schedule the UE-specific PDSCH for each UE.
  • the CRC of the UE-specific PDCCH is scrambled using the UE-specific RNTI (i.e., C-RNTI).
  • the UE-specific PDSCH uses the UE-specific RNTI (i.e., C-RNTI). -RNTI) scrambling.
  • the retransmission mechanism of MBS service based on HARQ-ACK feedback in the connected state supports the following methods:
  • NR MBS services dynamic scheduling and semi-persistent scheduling (SPS)) support two HARQ-ACK feedback modes:
  • ⁇ Feedback mode two NACK-only feedback mode.
  • the UE receives the PDSCH and decodes it correctly without feeding back any information; the UE does not receive the PDSCH or fails to decode it, that is, it feeds back a NACK through the uplink resource PUCCH.
  • NR MBS multicast and unicast use HPID (HARQ process ID, HARQ process identification)
  • HPID The HPID of the system (HPID: 0 ⁇ 15) is shared between multicast/multicast and unicast.
  • the specific allocation of HPID is determined by the base station implementation. For example, if HPID#1 is first assigned to the transmission of a TB (Transport Block) 1 of the MBS service, when the initial transmission and potential retransmission of TB1 are completed, the base station will continue to assign HPID#1 to TB2. Transmission use, at this time TB2 is used for unicast transmission of UE3. When the initial transmission and potential retransmission of TB2 are completed, the base station will continue to allocate HPID#1 to the transmission of TB3. At this time, TB3 is used for the transmission of MBS services.
  • TB Transmission Block
  • HPID and NDI New Data Indicator, new data indicator
  • the codebook is a sequence of bits constructed using ACK/NACK feedback from multiple PDSCH receptions for a configured time window.
  • 3GPP defines two types of HARQ codebooks:
  • Type1 codebook is a fixed size codebook provided by gNB through RRC signaling (semi-static);
  • Type2 codebooks are codebooks that have dynamic sizes and change based on resource allocation.
  • Type 1 Codebook (Type 1 codebook, semi-static codebook)
  • the total size of the Type 1 codebook is the sum of the number of PDSCH transmissions within a given time window. For a specific time window, this sum is related to:
  • the specific time window will be defined by the DCI used to allocate PDSCH resources.
  • the PDSCH UE receives not 3 but 2 PDSCH allocations, then the UE will still send 528 bits.
  • 3GPP defined Type 2 codebooks with dynamic sizes.
  • Type 2 Codebook (Type 2 codebook, dynamic codebook)
  • Type2 codebooks eliminate inefficiencies caused by unused transmission occasions, but another difficulty with Type2 codebooks is maintaining correct calculations between the actual transmission and feedback.
  • the UE does not have PDSCH transmission in the vacant codebook entries, that is, the codebook entries and PDSCH are mapped one-to-one.
  • DAI Downlink Assignment Indicator
  • DAI is a 2-bit field, and its range is 1 to 4, which means that DAI can detect up to 3 missed transfers.
  • the gNB will provide the DAI value and if the UE detects any missing value of DAI, the UE will assume a missing transmission and it will be mapped into a blank codebook. The counter value will be reset on every fourth transfer.
  • Figure 4 shows a flow chart of a HARQ feedback method provided by an embodiment of the present application. This method can be applied to the terminal of the system architecture shown in Figure 1. The method includes the following steps.
  • Step 210 Report the SPSPDSCH reception feedback of the MBS to the access network device according to the NACK-only feedback mode.
  • the terminal is configured to report the reception feedback of the SPS PDSCH of the MBS using the NACK-only (negative acknowledgment only) feedback mode.
  • the access network equipment sends MBS service data through PDSCH.
  • the terminal receives the PDSCH sent by the access network device, and the PDSCH carries MBS service data.
  • the transmission resources of the PDSCH are configured through SPS (semi-persistent scheduling). That is, the SPS PDSCH of MBS means: PDSCH is used to transmit MBS, and the PDSCH adopts the SPS scheduling method.
  • the access network device may transmit the MBS in any one of broadcast, multicast, and unicast modes.
  • the access network device broadcasts PDSCH.
  • Terminals in the non-connected state RRC idle state/RRC inactive state
  • terminals in the connected state RRC connected state
  • MBS business data can be received from the access network device and read from it.
  • the access network device sends the PDSCH to a first group of terminals.
  • the first group of terminals includes at least two terminals, including terminals that perform embodiments of the present application.
  • the first group of terminals respectively receive the PDSCH and read the MBS service data therefrom.
  • the first group of terminals is in RRC connected state.
  • the access network device sends the PDSCH to the first terminal
  • the first terminal is the terminal that performs the embodiment of the present application.
  • the first terminal receives the PDSCH sent by the access network device and reads the MBS service data therefrom.
  • the first terminal is in RRC connected state.
  • the terminal needs to feedback the reception status of the PDSCH to the access network device, that is, perform HARQ feedback of the PDSCH to inform the access network device whether the terminal successfully receives the PDSCH. If the terminal fails to receive the PDSCH successfully, the access network device can initiate retransmission of the PDSCH based on the HARQ feedback.
  • the access network equipment configures the terminal to report the SPS PDSCH of the MBS in NACK-only feedback mode. That is, if the terminal successfully receives the PDSCH, it does not need to report reception feedback to the access network device. If the terminal fails to receive the PDSCH, it reports reception failure feedback to the access network device.
  • the reception feedback can also be replaced with HARQ feedback, HARQ feedback information, feedback information, reception feedback information, ACK/NACK information, NACK information and other nouns with similar meanings.
  • the reception feedback includes the reception feedback information of the SPS PDSCH of the MBS received by the terminal. For example, a 1 in the receiving feedback indicates ACK, that is, the SPS PDSCH of the MBS is received; a 0 in the receiving feedback indicates a NACK, that is, the SPS PDSCH of the MBS is not received.
  • the SPS PDSCH of each MBS corresponds to an uplink feedback resource PUCCH (Physical Uplink Control Channel, physical uplink control channel).
  • the SPS PDSCHs of multiple MBSs may correspond to the same uplink feedback resource PUCCH, and the terminal feeds back the feedback information corresponding to the SPS PDSCHs of multiple MBSs on the uplink feedback resource PUCCH. That is, the received feedback includes multiple feedback information, each feedback information Indicates the reception status of SPS PDSCH of an MBS.
  • multiple pieces of feedback information are fed back by forming a codebook, that is, the received feedback is a codebook generated based on the multiple pieces of feedback information.
  • PDSCH1 of MBS SPS#1 corresponds to the uplink feedback resource PUCCH
  • PDSCH2 of MBS SPS#2 corresponds to the uplink feedback resource PUCCH1; if PDSCH1 is successfully received but PDSCH2 fails to be received, then in PUCCH1 the corresponding PDSCH1 and PDSCH2
  • the codebook generated by the two feedback messages can be 10.
  • PDSCH3 of MBS SPS#1 corresponds to the uplink feedback resource PUCCH2
  • PDSCH4 of MBS SPS#2 corresponds to the uplink feedback resource PUCCH2; if PDSCH3 reception fails and PDSCH4 reception fails, the codebook generated by the two feedback information corresponding to PDSCH3 and PDSCH4 in PUCCH2 Can be 00.
  • the terminal feedbacks the reception status of the MBS's SPS PDSCH to the access network device according to the NACK-only feedback mode. If the MBS's SPS PDSCH is successfully received, no feedback is sent to the access network device. Information, if the SPS PDSCH of MBS fails to be received, feedback information (NACK) of reception failure is sent to the access network device.
  • NACK feedback information
  • the NACK-only feedback mode can reduce the size of feedback information, reduce the occupation of uplink feedback resources, and improve resource utilization. Rate.
  • Figure 6 shows a flow chart of a hybrid automatic repeat request HARQ feedback method provided by an embodiment of the present application. This method can be applied to the access network equipment of the system architecture shown in Figure 1. The method includes the following steps.
  • Step 220 Receive reception feedback of the SPSPDSCH of the MBS sent by the terminal according to the NACK-only feedback mode.
  • the access network equipment sends configuration information to the terminal.
  • the configuration information is used to instruct the terminal to report the SPS PDSCH reception feedback of the MBS in accordance with the NACK-only feedback mode.
  • the NACK-only feedback mode is the HARQ feedback mode configured by the access network equipment for the terminal, but the HARQ feedback mode actually adopted by the terminal may not be the NACK-only feedback mode.
  • the terminal actually generates reception feedback it can follow the configuration
  • the NACK-only feedback mode generates reception feedback, and can also automatically switch to the ACK/NACK feedback mode to generate reception feedback. That is, although the access network device instructs the terminal to perform feedback in the NACK-only feedback mode, the actual received feedback may be feedback information in the NACK-only feedback mode or feedback information in the ACK/NACK feedback mode.
  • the terminal automatically switches the feedback mode from the NACK-only feedback mode to the ACK/NACK feedback mode to generate reception feedback.
  • the access network equipment will read and receive feedback according to the ACK/NACK feedback mode.
  • the terminal feedbacks the reception status of the MBS's SPS PDSCH to the access network device according to the NACK-only feedback mode. If the MBS's SPS PDSCH is successfully received, no feedback is sent to the access network device. Information, if the SPS PDSCH of MBS fails to be received, feedback information (NACK) of reception failure is sent to the access network device.
  • NACK feedback information
  • the NACK-only feedback mode can reduce the size of feedback information, reduce the occupation of uplink feedback resources, and improve resource utilization. Rate.
  • an exemplary embodiment is provided in which the terminal reports reception feedback after receiving the SPS PDSCH of the MBS.
  • Figure 7 shows a flow chart of a hybrid automatic repeat request HARQ feedback method provided by an embodiment of the present application.
  • This method can be applied to terminals and access network equipment in the system architecture shown in Figure 1.
  • the method includes the following steps.
  • Step 301 The access network device sends feedback configuration information to the terminal.
  • the access network device sends a PDCCH to the terminal, and the PDCCH carries feedback configuration information; the terminal receives the PDCCH.
  • the PDCCH includes DCI, and the DCI includes feedback configuration information.
  • the PDCCH includes an RRC message, and the RRC message includes feedback configuration information.
  • the feedback configuration information is used to indicate that the HARQ feedback mode of the SPS PDSCH of the MBS is the NACK-only feedback mode.
  • the access network device can also send configuration information to the terminal.
  • the configuration information is used to indicate the uplink feedback resources of the SPS PDSCH of the MBS; the terminal receives the configuration information sent by the access network device.
  • the access network device sends a PDCCH to the terminal, and the PDCCH carries configuration information.
  • the PDCCH includes DCI, and the DCI includes configuration information.
  • the PDCCH includes an RRC message, and the RRC message includes configuration information.
  • This configuration information can instruct the terminal to report the SPS PDSCH reception feedback of the MBS after receiving the DCI.
  • the configuration information may instruct the terminal to report the reception feedback of the SPS PDSCH of the MBS after receiving the last SPS PDSCH of the MBS.
  • the configuration information may indicate that the terminal reports the uplink feedback resources used by the SPS PDSCH of the MBS to receive feedback.
  • the access network device can also send the scheduling information of the SPS PDSCH of the MBS to the terminal.
  • the scheduling information is used to indicate the transmission resources of the SPS PDSCH of the MBS; the terminal receives the scheduling information sent by the access network device.
  • the access network device sends a PDCCH to the terminal, and the PDCCH carries scheduling information.
  • the PDCCH includes DCI, and the DCI includes scheduling information.
  • the terminal After receiving the scheduling information, the terminal receives the SPS PDSCH of the MBS on the transmission resources indicated by the scheduling information.
  • Step 302 The access network device sends the SPS PDSCH of the MBS.
  • the access network equipment sends the SPS PDSCH of the MBS through broadcast, multicast or unicast.
  • Step 303 The terminal receives the SPS PDSCH of the MBS sent by the access network device.
  • the terminal receives the SPS PDSCH of the MBS sent by the access network equipment, and generates reception feedback based on the reception of the SPS PDSCH of the MBS.
  • the received feedback only includes one bit of feedback information. For example, if the terminal receives the first PDSCH of the SPS of the MBS, the uplink feedback resource corresponding to the first PDSCH is the first PUCCH, and there is and only the uplink feedback resource corresponding to the first PDSCH is the first PUCCH, then the terminal only needs to One-bit reception feedback of the first PDSCH is sent on a PUCCH.
  • the received feedback includes a codebook formed by the feedback information corresponding to the SPS PDSCH of the MBS; that is, the received feedback includes a code block composed of a series of consecutive bits.
  • Receiving feedback as code blocks may include the following situations;
  • the SPS PDSCH of an MBS corresponds to multiple transport blocks (Transport Block, TB). Each transport block corresponds to one bit of feedback information. Multiple bits of feedback information are connected to obtain a code block.
  • the SPS PDSCH of multiple MBSs correspond to the same uplink feedback resource.
  • the SPS PDSCH of each MBS corresponds to at least one bit of feedback information. Multiple bits of feedback information are connected to obtain a code block, and the terminal transmits the code on the uplink feedback resource. block (receiving feedback).
  • the codebook may be a Type1 codebook (Type 1 codebook) and/or a Type2 codebook (Type 2 codebook).
  • the access network device will also configure codebook type information to the terminal.
  • the codebook type information is used to indicate the codebook type used to receive feedback.
  • the terminal generates a codebook for receiving feedback according to the codebook type indicated by the access network device. Codebook.
  • the terminal When generating reception feedback according to the Type1 codebook: the terminal needs to convert the feedback mode from the NACK-only feedback mode to the ACK/NACK feedback mode. That is, the terminal converts the HARQ feedback mode from the NACK-only feedback mode to the positive response/negative response ACK/NACK feedback mode; the ACK/NACK feedback mode is used to report the SPS PDSCH reception feedback of the MBS to the access network device.
  • the terminal can provide feedback according to the NACK-only feedback mode, or can switch to the ACK/NACK feedback mode for feedback.
  • the terminal uses the NACK-only feedback mode to report the MBS SPS PDSCH reception feedback to the access network equipment; or, converts the HARQ feedback mode from the NACK-only feedback mode to the ACK/NACK feedback mode; uses the ACK/NACK feedback mode to report to the access network device.
  • the network equipment reports the SPS PDSCH reception feedback of MBS.
  • the feedback information corresponding to the SPS PDSCHs of each MBS can be arranged in any of the following ways:
  • Sorting method 1 Arrange according to SPS index (SPS-index). That is, in the codebook, multiple feedback information corresponding to the SPS PDSCH of multiple MBSs are arranged according to the SPS index.
  • the information may be arranged in SPS index order or in reverse order of the SPS index, which is not limited in the embodiment of the present application.
  • the PDSCH of MBS adopts semi-persistent scheduling (SPS).
  • SPS semi-persistent scheduling
  • the access network equipment first configures at least one set of SPS resources for the terminal, and each set of SPS resources corresponds to an SPS index.
  • the access network device configures the PDSCH transmission resources of the MBS, it uses the SPS index to indicate that one of the SPS resources is used to transmit the PDSCH of the MBS.
  • the SPS PDSCH of each MBS corresponds to an SPS index.
  • the terminal sorts the feedback information according to the SPS index corresponding to the SPS PDSCH of each MBS, and then generates a codebook based on multiple feedback information.
  • the terminal receives the SPS PDSCH1, PDSCH2, PDSCH3 and PDSCH4 of MBS.
  • the SPS index of PDSCH1 is SPS#1
  • the SPS index of PDSCH2 is SPS#2
  • the SPS index of PDSCH3 is SPS#3.
  • the SPS index of PDSCH4 is SPS#4.
  • Four PDSCHs are instructed to perform HARQ feedback on the same uplink feedback resource PUCCH.
  • the reception feedback in the PUCCH includes feedback information corresponding to the four PDSCHs, that is, the reception feedback includes a codebook composed of 4-bit feedback information; the order of the 4-bit feedback information in the codebook is arranged in accordance with the SPS index order, that is, , the first bit is the feedback information of PDSCH1 of SPS#1, the second bit is the feedback information of PDSCH2 of SPS#2, the third bit is the feedback information of PDSCH3 of SPS#3, and the fourth bit is the feedback information of PDSCH4 of SPS#4.
  • Each feedback message includes ACK or NACK.
  • Sorting method 2 Arrange according to G-CS-RNTI (Group Configured Scheduling RNTI, Group-Semi-Persistent Scheduling-Wireless Network Temporary Identifier).
  • G-CS-RNTI Group Configured Scheduling RNTI, Group-Semi-Persistent Scheduling-Wireless Network Temporary Identifier.
  • the codebook multiple feedback information corresponding to the SPS PDSCH of multiple MBSs are arranged according to G-CS-RNTI.
  • the information may be arranged in G-CS-RNTI order or in reverse order of G-CS-RNTI, which is not limited in the embodiment of the present application.
  • G-CS-RNTI is used to scramble and descramble PDSCH.
  • the access network device scrambles PDSCH according to G-CS-RNTI and then sends the scrambled PDSCH; the terminal receives the scrambled PDSCH. , descramble it according to G-CS-RNTI to obtain PDSCH.
  • the access network equipment configures a G-CS-RNTI for each PDSCH, that is, each PDSCH corresponds to a G-CS-RNTI.
  • Sorting method 3 Arrange according to PDSCH timing. That is, in the codebook, multiple feedback information corresponding to the SPS PDSCH of multiple MBSs are arranged in time sequence.
  • the timing may be at least one of the reception timing of the SPS PDSCH of the MBS and the transmission timing of the SPS PDSCH of the MBS.
  • they can be arranged in chronological order or in reverse chronological order, which is not limited by the embodiment of the present application.
  • the terminal sequentially receives the SPS PDSCH1, PDSCH3, PDSCH2 and PDSCH4 of the MBS.
  • Four PDSCHs are instructed to perform HARQ feedback on the same uplink feedback resource PUCCH.
  • the reception feedback in the PUCCH includes feedback information corresponding to the four PDSCHs, that is, the reception feedback includes a codebook composed of 4-bit feedback information; the order of the 4-bit feedback information in the codebook is arranged according to the reception timing of the PDSCH, That is, the first bit is the feedback information of PDSCH1, the second bit is the feedback information of PDSCH3, the third bit is the feedback information of PDSCH2, and the fourth bit is the feedback information of PDSCH4.
  • Each feedback message includes ACK or NACK.
  • Step 304 The terminal sends the SPS PDSCH reception feedback of the MBS to the access network device.
  • the terminal After generating the reception feedback, the terminal sends the reception feedback of the SPS PDSCH of the MBS to the access network device on the indicated PUCCH.
  • the terminal feeds back the reception status of the SPS PDSCH of the MBS to the access network device according to the NACK-only feedback mode.
  • the terminal needs to feed back multiple feedback information on the same uplink feedback resource, the terminal A codebook is formed based on multiple feedback information. If the codebook is a type 1 codebook, the terminal needs to convert the feedback mode from NACK-only feedback mode to ACK/NACK feedback mode. If the codebook is a type 2 codebook, the terminal can adopt the NACK-only feedback mode or the ACK/NACK feedback mode. This enables SPS PDSCH that uses NACK-only feedback mode to feed back MBS.
  • the feedback information corresponding to the SPS PDSCHs of the multiple MBSs can form a codebook in a certain order, and the terminal reports the SPS PDSCHs of multiple MBSs to the access network device. Report the codebook.
  • the SPS PDSCH of MBS and the SPS PDSCH of unicast service may correspond to the same uplink feedback resource.
  • An embodiment of feeding back the reception feedback of MBS and unicast service in the same uplink feedback resource is provided.
  • Figure 10 shows a flow chart of a hybrid automatic repeat request HARQ feedback method provided by an embodiment of the present application. This method can be applied to terminals and access network equipment in the system architecture shown in Figure 1. The method includes the following steps.
  • Step 401 The access network device sends the SPS PDSCH of the MBS and the SPS PDSCH of the unicast service.
  • Step 402 The terminal receives the SPS PDSCH of the MBS and the SPS PDSCH of the unicast service sent by the access network device.
  • the terminal receives at least one SPS PDSCH of MBS and at least one SPS PDSCH of unicast service.
  • the SPS PDSCH of each MBS corresponds to an uplink feedback resource PUCCH
  • the SPS PDSCH of each unicast service corresponds to an uplink feedback resource PUCCH.
  • the uplink feedback resource of the SPS PDSCH of the MBS and the uplink feedback resource of the SPS PDSCH of the unicast service can be the same uplink feedback resource. That is, the terminal feeds back the reception status of multiple PDSCH/TBs in one uplink feedback resource, including TBs of MBS and TBs of unicast services.
  • the terminal receives PDSCH1 and PDSCH5 of MBS SPS#1; receives PDSCH2 and PDSCH6 of MBS SPS#2; receives PDSCH3 and PDSCH7 of unicast service SPS#3; receives PDSCH4 of unicast service SPS#4 , PDSCH8; among them, the uplink feedback resources corresponding to PDSCH1, PDSCH2, PDSCH3, and PDSCH4 are PUCCH1; and the uplink feedback resources corresponding to PDSCH5, PDSCH6, PDSCH7, and PDSCH8 are PUCCH2.
  • an uplink feedback resource includes feedback information corresponding to SPS PDSCHs of N MBSs and feedback information corresponding to SPS PDSCHs of M unicast services.
  • N 0, M ⁇ 0.
  • the uplink feedback resource only contains the feedback information of the SPS PDSCH of the MBS; when N equals 0, the uplink feedback resource only contains the feedback information of the SPS PDSCH of the unicast service.
  • the SPS PDSCH of MBS is configured to adopt NACK-only feedback mode; the SPS PDSCH of unicast service is configured to adopt ACK/NACK feedback mode.
  • the SPS PDSCH of the unicast service can also be configured to adopt the NACK-only feedback mode.
  • This embodiment uses the ACK/NACK feedback mode as an example.
  • one PDSCH corresponds to at least one TB, and each TB corresponds to one bit of feedback information.
  • the feedback information may be ACK or NACK.
  • the multiple feedback information when multiple feedback information corresponding to multiple TBs need to be fed back on an uplink feedback resource, the multiple feedback information forms a codebook.
  • the codebook the SPS of the MBS and the NACK of the PDSCH The -only feedback mode is converted to ACK/NACK feedback mode, and then the feedback information generated according to the ACK/NACK feedback mode is imported into the codebook.
  • the codebook can be a Type1 codebook or a Type2 codebook.
  • the codebook when the codebook is a Type1 codebook, the feedback mode of the SPS PDSCH of the MBS must be changed from the NACK-only feedback mode to the ACK/NACK feedback mode.
  • the feedback mode of the MBS's SPS PDSCH can be the NACK-only feedback mode, or it can be converted to the ACK/NACK feedback mode.
  • the feedback is performed by forming a codebook.
  • the codebook includes feedback information corresponding to the SPS PDSCH of the unicast service and feedback information corresponding to the SPS PDSCH of the MBS.
  • Method 1 Cascade codebook generation.
  • the codebook includes a cascaded first sub-codebook and a second sub-codebook.
  • the first sub-codebook is formed by the feedback information corresponding to the SPS PDSCH of the unicast service;
  • the second sub-codebook is formed by the feedback information corresponding to the SPS PDSCH of the MBS. form.
  • the terminal forms a first subcodebook based on the feedback information of the SPS PDSCH of the unicast service, and the first subcodebook includes at least one bit; the terminal forms a second subcodebook based on the feedback information of the SPS PDSCH of the MBS, and the second subcodebook This contains at least one bit.
  • the terminal cascades the first sub-codebook and the second sub-codebook to obtain a codebook, which is the reception feedback.
  • the order of the first sub-codebook and the second sub-codebook in the codebook can be arbitrary.
  • the first sub-codebook is in front and the second sub-codebook is in the back; in another case, The second sub-codebook is in the front and the first sub-codebook is in the back.
  • the at least two pieces of feedback information are arranged in a certain order.
  • the order of arrangement may refer to the description in the embodiment shown in FIG. 7 .
  • the multiple feedback information corresponding to the SPS PDSCH of multiple MBS are arranged according to the SPS index; or, in the second sub-codebook, the SPS PDSCH of multiple MBS respectively correspond to
  • the multiple feedback information of multiple MBS are arranged according to G-CS-RNTI; or, in the second sub-codebook, the multiple feedback information corresponding to the SPS PDSCH of multiple MBS are arranged in time sequence; where the time sequence includes the reception order of the SPS PDSCH of the MBS , at least one of the sending sequences of SPS of MBS and PDSCH.
  • the terminal receives PDSCH1 of MBSSPS#1, PDSCH2 of MBS SPS#2, PDSCH3 of unicast service SPS#3, and PDSCH4 of unicast service SPS#4.
  • the four PDSCHs are instructed to perform HARQ feedback on the same uplink feedback resource PUCCH, and use the Type1 codebook.
  • the terminal uses the ACK/NACK feedback mode to generate the first sub-codebook corresponding to the unicast service, and converts the NACK-only feedback mode to the ACK/NACK feedback mode to generate the second sub-codebook corresponding to the MBS.
  • the first sub-codebook includes The feedback information corresponding to PDSCH3 and PDSCH4, and the second sub-codebook includes the feedback information of PDSCH1 and PDSCH2.
  • the feedback information in the first sub-codebook and the second sub-codebook are sorted according to the SPS index.
  • the first bit of the first sub-codebook is the feedback information of PDSCH3 of SPS#3, and the second bit is the feedback information of PDSCH4 of SPS#4.
  • the first bit of the second sub-codebook is the feedback information of PDSCH1 of SPS#1, and the second bit is the feedback information of PDSCH2 of SPS#2.
  • Each feedback message includes ACK or NACK.
  • the first sub-codebook and the second sub-codebook are cascaded to obtain the codebook (receiving feedback).
  • the terminal receives PDSCH1 of MBS SPS#1, PDSCH2 of MBS SPS#2, PDSCH3 of unicast service SPS#3, and PDSCH4 of unicast service SPS#4.
  • the four PDSCHs are instructed to perform HARQ feedback on the same uplink feedback resource PUCCH, and use the Type1 codebook.
  • the terminal uses the ACK/NACK feedback mode to generate the first sub-codebook corresponding to the unicast service, and converts the NACK-only feedback mode to the ACK/NACK feedback mode to generate the second sub-codebook corresponding to the MBS.
  • the first sub-codebook includes The feedback information corresponding to PDSCH3 and PDSCH4, and the second sub-codebook includes the feedback information of PDSCH1 and PDSCH2.
  • the feedback information in the first sub-codebook and the second sub-codebook are ordered according to the reception timing of the PDSCH.
  • the first bit of the first sub-codebook is the feedback information of PDSCH4 of SPS#4, and the second bit is the feedback information of PDSCH3 of SPS#3.
  • the first bit of the second sub-codebook is the feedback information of PDSCH2 of SPS#2, and the second bit is the feedback information of PDSCH1 of SPS#1.
  • Each feedback message includes ACK or NACK.
  • the first sub-codebook and the second sub-codebook are cascaded to obtain the codebook (receiving feedback).
  • the terminal is configured to use the Type2 codebook to generate unicast services and reception feedback corresponding to the SPS PDSCH of the MBS. Then the terminal uses the NACK-only feedback mode to generate the second sub-codebook corresponding to the SPS PDSCH of the MBS, and uses the ACK/NACK feedback mode to generate the first sub-codebook corresponding to the SPS PDSCH of the unicast service. The first sub-codebook is cascaded with the second sub-codebook to obtain the codebook.
  • Method 2 Mixed codebook generation.
  • the feedback information corresponding to the SPS PDSCH of the unicast service and the feedback information corresponding to the SPS PDSCH of the MBS are arranged according to the transmission/reception timing of the PDSCH; or, in the codebook, the feedback information corresponding to the SPS PDSCH of the unicast service and the MBS
  • the feedback information corresponding to the SPS PDSCH is arranged according to the SPS index; among them, the sending/receiving timing of the PDSCH includes at least one of the following: the sending/receiving timing of the SPS PDSCH of the unicast service, and the sending/receiving timing of the SPS PDSCH of the MBS.
  • the terminal sorts the feedback information corresponding to the unicast service and the feedback information corresponding to the MBS in a certain order to generate a codebook, in which the feedback information corresponding to the unicast service and the feedback information corresponding to the MBS are mixed and arranged.
  • the terminal receives PDSCH1 of MBS SPS#1, PDSCH2 of MBS SPS#2, PDSCH3 of unicast service SPS#3, and PDSCH4 of unicast service SPS#4.
  • the four PDSCHs are instructed to perform HARQ feedback on the same uplink feedback resource PUCCH, and use the Type1 codebook.
  • the terminal uses the ACK/NACK feedback mode to generate feedback information corresponding to the unicast service, and the terminal converts the NACK-only feedback mode to the ACK/NACK feedback mode to generate feedback information corresponding to the MBS.
  • Multiple feedback information are ordered according to the reception timing of PDSCH to form a codebook.
  • the first bit of the codebook is the feedback information of PDSCH1 of MBS SPS#1
  • the second bit is the feedback information of PDSCH3 of unicast service SPS#3
  • the third bit is the feedback information of PDSCH2 of MBS SPS#2
  • the fourth bit is the feedback information of PDSCH2 of MBS SPS#2.
  • the bits are the feedback information of PDSCH4 of unicast service SPS#4.
  • Each feedback message includes ACK or NACK.
  • Step 403 The terminal sends reception feedback of the SPS PDSCH of the MBS and the SPS PDSCH of the unicast service to the access network device.
  • the terminal After generating the reception feedback, the terminal sends the reception feedback of the SPS PDSCH of the MBS and the SPS PDSCH of the unicast service to the access network device on the indicated PUCCH.
  • the method provided by this embodiment provides a method of multiplexing uplink feedback resources with ACK/NACK feedback of unicast SPS service in NACK-only feedback mode for semi-persistent scheduling in broadcast multicast services.
  • One way is that the UE retains the NACK-only feedback mode of the MBS SPS, and forms a dynamic codebook together with the ACK/NACK feedback information of the unicast SPS for feedback on the same uplink resource.
  • Another way is that the UE converts the NACK-only feedback mode of the MBS SPS into the ACK/NACK feedback mode, and forms a codebook for feedback of the ACK/NACK feedback information in different ways. These different ways include forming subcodes. Each sub-codebook is sorted according to the timing sequence of PDSCH or the SPS index value from small to large.
  • the method provided by this embodiment provides a method of multiplexing uplink feedback resources with ACK/NACK feedback of unicast SPS service in the NACK-only feedback mode of semi-persistent scheduling (SPS) in NR broadcast multicast service (MBS). method.
  • SPS semi-persistent scheduling
  • MBS NR broadcast multicast service
  • the NACK-only feedback mode of NR MBS is a more compromised feedback mode, but when it is applied to MBS semi-persistent scheduling, if it can only use independent uplink resources to report separately and If it cannot be multiplexed with the uplink feedback of unicast SPS, its advantages will be greatly offset.
  • the uplink feedback method provided in this embodiment can not only combine and report multiple NACK-only feedback information bits, but also combine and report them together with the feedback information of the unicast service SPS; in addition, the upgrade and improvement of codebook generation can also be reported This greatly improves the utilization efficiency of uplink resources and reduces the complexity on the UE side.
  • the PDSCH of the SPS mentioned in this application does not include the first/first group of PDSCHs scheduled when PDCCH/DCI is used to activate the SPS, and only includes non-DCI scheduled PDSCHs in subsequent SPS.
  • Figure 15 shows a structural block diagram of a hybrid automatic repeat request HARQ feedback device provided by an exemplary embodiment of the present application.
  • the device can be implemented as a terminal, or implemented as a part of the terminal.
  • the device includes:
  • the first sending module 501 is configured to report the reception feedback of the semi-persistent scheduling SPS physical downlink shared channel PDSCH of the multicast broadcast service MBS to the access network device according to the NACK-only feedback mode.
  • the device further includes:
  • the first receiving module 502 is configured to receive feedback configuration information sent by the access network device, where the feedback configuration information indicates that the HARQ feedback mode of the SPS PDSCH of the MBS is the NACK-only feedback mode.
  • the reception feedback includes a codebook formed by feedback information corresponding to the SPS PDSCH of the MBS;
  • the feedback information corresponding to the SPS PDSCH of the MBS includes at least one of the following: multiple feedback information corresponding to multiple transmission blocks TB of the SPS PDSCH of one MBS, multiple feedback information corresponding to the SPS PDSCH of multiple MBS. .
  • the codebook includes a Type 1 codebook and/or a Type 2 codebook.
  • the codebook is a type 1 codebook
  • the reporting of the reception feedback of the semi-persistent scheduling SPS physical downlink shared channel PDSCH of the multicast service MBS to the access network device according to the NACK-only feedback mode includes:
  • the ACK/NACK feedback mode is used to report the reception feedback of the SPSPDSCH of the MBS to the access network device.
  • the codebook is a type 2 codebook
  • the reporting of the reception feedback of the semi-persistent scheduling SPS physical downlink shared channel PDSCH of the multicast service MBS to the access network device according to the NACK-only feedback mode includes:
  • the feedback information corresponding to the SPS PDSCH of the MBS includes multiple feedback information corresponding to the SPS PDSCH of multiple MBSs;
  • multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged according to the SPS index;
  • the multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged according to the group-semi-persistent scheduling-radio network temporary identifier G-CS-RNTI;
  • multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged in time sequence;
  • the timing includes at least one of the receiving sequence of the SPS PDSCH of the MBS and the sending sequence of the SPS PDSCH of the MBS.
  • the codebook includes feedback information corresponding to the SPS PDSCH of the unicast service and feedback information corresponding to the SPS PDSCH of the MBS.
  • the codebook includes a concatenated first sub-codebook and a second sub-codebook, and the first sub-codebook is formed by feedback information corresponding to the SPS PDSCH of the unicast service ;
  • the second sub-codebook is formed by feedback information corresponding to the SPS PDSCH of the MBS.
  • the feedback information corresponding to the SPS PDSCH of the MBS includes multiple feedback information corresponding to the SPS PDSCH of multiple MBSs;
  • multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged according to the SPS index;
  • the multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged according to the group-semi-persistent scheduling-radio network temporary identifier G-CS-RNTI;
  • multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged in time sequence;
  • the timing includes at least one of the receiving sequence of the SPS PDSCH of the MBS and the sending sequence of the SPS PDSCH of the MBS.
  • the feedback information corresponding to the SPS PDSCH of the unicast service and the feedback information corresponding to the SPS PDSCH of the MBS are arranged according to the transmission/reception timing of the PDSCH;
  • the feedback information corresponding to the SPS PDSCH of the unicast service and the feedback information corresponding to the SPS PDSCH of the MBS are arranged according to the SPS index;
  • the sending/receiving timing of the PDSCH includes at least one of the following: the sending/receiving timing of the SPS PDSCH of the unicast service, and the sending/receiving timing of the SPS PDSCH of the MBS.
  • the SPS PDSCH of the unicast service adopts ACK/NACK feedback mode.
  • the SPS PDSCH of the unicast service and the SPS PDSCH of the MBS correspond to the same uplink feedback resource, and the uplink feedback resource is used to report the reception feedback.
  • Figure 16 shows a structural block diagram of a hybrid automatic repeat request HARQ feedback device provided by an exemplary embodiment of the present application.
  • the device can be implemented as a network device, or can be implemented as part of an access network device.
  • the device includes:
  • the second receiving module 503 is configured to receive reception feedback of the semi-persistent scheduling SPS physical downlink shared channel PDSCH of the multi-broadcast service MBS sent by the terminal according to the NACK-only feedback mode.
  • the device further includes:
  • the second sending module 504 is configured to send feedback configuration information to the terminal, where the feedback configuration information indicates that the HARQ feedback mode of the SPS PDSCH of the MBS is the NACK-only feedback mode.
  • the reception feedback includes a codebook formed by feedback information corresponding to the SPS PDSCH of the MBS;
  • the feedback information corresponding to the SPS PDSCH of the MBS includes at least one of the following: multiple feedback information corresponding to multiple transmission blocks TB of the SPS PDSCH of one MBS, multiple feedback information corresponding to the SPS PDSCH of multiple MBS. .
  • the codebook includes a Type 1 codebook and/or a Type 2 codebook.
  • the codebook is a type 1 codebook
  • the ACK/NACK feedback mode is used to feed back the SPSPDSCH of the MBS.
  • the codebook is a type 2 codebook
  • a NACK-only feedback mode is used to feed back the reception feedback of the SPSPDSCH of the MBS;
  • the ACK/NACK feedback mode is used to feed back the reception feedback of the SPSPDSCH of the MBS.
  • the feedback information corresponding to the SPS PDSCH of the MBS includes multiple feedback information corresponding to the SPS PDSCH of multiple MBSs;
  • multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged according to the SPS index;
  • the multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged according to the group-semi-persistent scheduling-radio network temporary identifier G-CS-RNTI;
  • multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged in time sequence;
  • the timing includes at least one of the receiving sequence of the SPS PDSCH of the MBS and the sending sequence of the SPS PDSCH of the MBS.
  • the codebook includes feedback information corresponding to the SPS PDSCH of the unicast service and feedback information corresponding to the SPS PDSCH of the MBS.
  • the codebook includes a concatenated first sub-codebook and a second sub-codebook, and the first sub-codebook is formed by feedback information corresponding to the SPS PDSCH of the unicast service ;
  • the second sub-codebook is formed by feedback information corresponding to the SPS PDSCH of the MBS.
  • the feedback information corresponding to the SPS PDSCH of the MBS includes multiple feedback information corresponding to the SPS PDSCH of multiple MBSs;
  • multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged according to the SPS index;
  • the multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged according to the group-semi-persistent scheduling-radio network temporary identifier G-CS-RNTI;
  • multiple feedback information corresponding to the SPS PDSCHs of the multiple MBSs are arranged in time sequence;
  • the timing includes at least one of the receiving sequence of the SPS PDSCH of the MBS and the sending sequence of the SPS PDSCH of the MBS.
  • the feedback information corresponding to the SPS PDSCH of the unicast service and the feedback information corresponding to the SPS PDSCH of the MBS are arranged according to the transmission/reception timing of the PDSCH;
  • the feedback information corresponding to the SPS PDSCH of the unicast service and the feedback information corresponding to the SPS PDSCH of the MBS are arranged according to the SPS index;
  • the sending/receiving timing of the PDSCH includes at least one of the following: the sending/receiving timing of the SPS PDSCH of the unicast service, and the sending/receiving timing of the SPS PDSCH of the MBS.
  • the SPS PDSCH of the unicast service adopts ACK/NACK feedback mode.
  • the SPS PDSCH of the unicast service and the SPS PDSCH of the MBS correspond to the same uplink feedback resource, and the uplink feedback resource is used to report the reception feedback.
  • Figure 17 shows a schematic structural diagram of a communication device (terminal or network device) provided by an exemplary embodiment of the present application.
  • the communication device includes: a processor 101, a receiver 102, a transmitter 103, a memory 104 and a bus 105.
  • the processor 101 includes one or more processing cores.
  • the processor 101 executes various functional applications and information processing by running software programs and modules.
  • the receiver 102 and the transmitter 103 can be implemented as a communication component, which can be a communication chip, and the communication component can be called a transceiver.
  • the memory 104 is connected to the processor 101 via a bus 105 .
  • the memory 104 may be used to store at least one instruction, and the processor 101 is used to execute the at least one instruction to implement each step in the above method embodiment.
  • memory 104 may be implemented by any type of volatile or non-volatile storage device, or combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable Read-only memory (Electrically-Erasable Programmable Read Only Memory, EEPROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, EPROM), static random access memory (Static Random Access Memory, SRAM), read-only memory (Read-Only Memory, ROM), magnetic memory, flash memory, programmable read-only memory (Programmable Read-Only Memory, PROM).
  • magnetic or optical disks electrically erasable programmable Read-only memory (Electrically-Erasable Programmable Read Only Memory, EEPROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, EPROM), static random access memory (Static Random Access Memory, SRAM), read-only memory (Read-Only Memory, ROM), magnetic memory, flash memory, programmable read-only memory
  • the processor and transceiver in the communication device involved in the embodiment of the present application can perform the steps performed by the terminal in any of the methods shown above, which will not be described again here.
  • the communication device when the communication device is implemented as a terminal,
  • the transceiver is configured to report the reception feedback of the semi-persistent scheduling SPS physical downlink shared channel PDSCH of the multicast broadcast service MBS to the access network device according to the NACK-only feedback mode.
  • the processor and transceiver in the communication device involved in the embodiment of the present application can perform the steps performed by the network device (access network device) in any of the methods shown above. , which will not be described again here.
  • the communication device when the communication device is implemented as a network device,
  • the transceiver is configured to receive reception feedback of the semi-persistent scheduling SPS physical downlink shared channel PDSCH of the multicast broadcast service MBS sent by the terminal according to the NACK-only feedback mode.
  • a computer-readable storage medium in which at least one instruction, at least a program, a code set or an instruction set is stored, and the at least one instruction, the At least a section of the program, the code set or the instruction set is loaded and executed by the processor to implement the hybrid automatic repeat request HARQ feedback method executed by the communication device provided by each of the above method embodiments.
  • a chip is also provided.
  • the chip includes programmable logic circuits and/or program instructions. When the chip is run on a communication device, it is used to enable the communication device to implement the above aspects. Hybrid automatic repeat request HARQ feedback method.
  • a computer program product which when run on a processor of a communication device causes the communication device to perform the hybrid automatic repeat request HARQ feedback method described in the above aspect.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande se rapporte au domaine des communications sans fil. Sont divulgués un procédé et un appareil de rétroaction de demande de répétition automatique hybride (HARQ), ainsi qu'un dispositif et un support. Le procédé est appliqué à un terminal et consiste à : selon un mode de rétroaction d'accusé de réception négatif uniquement (NACK uniquement), signaler, à un dispositif de réseau d'accès, une rétroaction de réception d'un canal physique partagé de liaison descendante (PDSCH) de planification semi-persistante (SPS) d'un service de multidiffusion et de diffusion (MBS). Le procédé peut effectuer une rétroaction HARQ d'un PDSCH SPS d'un service MBS à l'aide d'un mode de rétroaction NACK uniquement.
PCT/CN2022/111063 2022-08-09 2022-08-09 Procédé et appareil de rétroaction de demande de répétition automatique hybride (harq), et dispositif et support Ceased WO2024031307A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202280093610.3A CN118844048A (zh) 2022-08-09 2022-08-09 混合自动重传请求harq反馈方法、装置、设备及介质
PCT/CN2022/111063 WO2024031307A1 (fr) 2022-08-09 2022-08-09 Procédé et appareil de rétroaction de demande de répétition automatique hybride (harq), et dispositif et support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/111063 WO2024031307A1 (fr) 2022-08-09 2022-08-09 Procédé et appareil de rétroaction de demande de répétition automatique hybride (harq), et dispositif et support

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021231835A1 (fr) * 2020-05-14 2021-11-18 Convida Wireless, Llc Mécanisme de planification pour diffusion générale et diffusion de groupe sur l'interface uu de nouvelle radio
CN113678500A (zh) * 2019-09-23 2021-11-19 Oppo广东移动通信有限公司 一种反馈资源配置方法及通信方法、装置、通信设备
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CN113678500A (zh) * 2019-09-23 2021-11-19 Oppo广东移动通信有限公司 一种反馈资源配置方法及通信方法、装置、通信设备
WO2021231835A1 (fr) * 2020-05-14 2021-11-18 Convida Wireless, Llc Mécanisme de planification pour diffusion générale et diffusion de groupe sur l'interface uu de nouvelle radio
CN114499771A (zh) * 2020-11-13 2022-05-13 成都鼎桥通信技术有限公司 Mbs的ack/nack信息的反馈与重传方法和装置

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